Saint Petersburg's 2021 population is now estimated at 5,504,305. In 1950, the population of Saint Petersburg was 2,902,789. Saint Petersburg has grown by 36,497 since 2015, which represents a 0.67% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Saint Petersburg, which typically includes Saint Petersburg's population in addition to adjacent suburban areas.